According to a gruesome legend, an architect sacrificed his wife to build this spectacular, 16th-century cathedral.

This location holds the truth to what truly happened that faithful night.

Makers and sellers of the original and finest York Ghosts.

European castle ruins in an American state park are actually the product of death and grief.

An acoustic anomaly with a mysterious cause.

Play over 120 retro arcade games and pinball machines at this throwback museum.

This secret Swiss fortress is disguised as a harmless pink house, complete with fake windows.

This parking garage was the site of what was - at the time - the largest cash robbery in history.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

During World War II, the Nazis repurposed this beer cellar to store stolen artwork.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

Two thousand artifacts from around the world collected by one woman who loved to travel.

A historic pub with traditional Irish cuisine, fine drinks, and a paranormal past.

Small caves once used as a hiding place for some of those accused during the Salem Witch Trials.

A small Japanese village claims to be the final resting place of the son of God (and God's other son's ear).

This grave in a ghost town cemetery marks the death of a witch on a day that never happened.

This historic Victorian mansion is allegedly so haunted that a signed waiver is required to enter.

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

Steaming blood-red hot spring from hell.

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

This caldera was once associated with the Etruscan god of the underworld.

A deadly ancient portal to the underworld.